7072215621520 has 80 divisors (see below), whose sum is σ = 18793177873920. Its totient is φ = 2424593106432.

The previous prime is 7072215621517. The next prime is 7072215621571. The reversal of 7072215621520 is 251265122707.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7072215621520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7869001 + ... + 8721559.

It is an arithmetic number, because the mean of its divisors is an integer number (234914723424).

Almost surely, 2^{7072215621520} is an apocalyptic number.

7072215621520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7072215621520 is an abundant number, since it is smaller than the sum of its proper divisors (11720962252400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7072215621520 is a wasteful number, since it uses less digits than its factorization.

7072215621520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867392 (or 867386 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 7072215621520 in words is "seven trillion, seventy-two billion, two hundred fifteen million, six hundred twenty-one thousand, five hundred twenty".