157620731545 has 8 divisors (see below), whose sum is σ = 189151449480. Its totient is φ = 126092204160.

The previous prime is 157620731497. The next prime is 157620731549. The reversal of 157620731545 is 545137026751.

It can be written as a sum of positive squares in 4 ways, for example, as 30183155289 + 127437576256 = 173733^2 + 356984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157620731545 - 2²⁷ = 157486513817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157620731495 and 157620731504.

It is not an unprimeable number, because it can be changed into a prime (157620731549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384940 + ... + 680749.

It is an arithmetic number, because the mean of its divisors is an integer number (23643931185).

Almost surely, 2^157620731545 is an apocalyptic number.

It is an amenable number.

157620731545 is a deficient number, since it is larger than the sum of its proper divisors (31530717935).

157620731545 is a wasteful number, since it uses less digits than its factorization.

157620731545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095275.

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 157620731545 in words is "one hundred fifty-seven billion, six hundred twenty million, seven hundred thirty-one thousand, five hundred forty-five".