72521350463757 has 32 divisors (see below), whose sum is σ = 109718213086720. Its totient is φ = 42239425233600.

The previous prime is 72521350463753. The next prime is 72521350463761. The reversal of 72521350463757 is 75736405312527.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72521350463753) and next prime (72521350463761).

It is not a de Polignac number, because 72521350463757 - 2² = 72521350463753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72521350463697 and 72521350463706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72521350463753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45781423 + ... + 47339004.

It is an arithmetic number, because the mean of its divisors is an integer number (3428694158960).

Almost surely, 2^{72521350463757} is an apocalyptic number.

It is an amenable number.

72521350463757 is a deficient number, since it is larger than the sum of its proper divisors (37196862622963).

72521350463757 is a wasteful number, since it uses less digits than its factorization.

72521350463757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93121513.

The product of its (nonzero) digits is 37044000, while the sum is 57.

The spelling of 72521350463757 in words is "seventy-two trillion, five hundred twenty-one billion, three hundred fifty million, four hundred sixty-three thousand, seven hundred fifty-seven".